The article studies saturation influence of a synchronous machine on model parameters. Special attention was paid to saturation process simulation in generator modeling by means of the finite elements method (FEM). The study analysed patterns of magnetic induction distribution over the generator cross-sectional area. It also focuses on real mode simulation in Park’s model by means of short-circuit operation, and islanding modes playback based on a phasor-measurement unit (PMU) date. Three sets of parameters were used - saturated, unsaturated and unsaturated parameters, considering no-load characteristics (NLC). The simulation results were compared with similar measurement signals-based PMU date.